nobel-winners crossfilter

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script 
    src="https://cdnjs.cloudflare.com/ajax/libs/crossfilter/1.3.12/crossfilter.min.js">
  </script>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)

svg.append("text")
      .text("Edit the code below to change me!")
      .attr("y", 200)
      .attr("x", 120)
      .attr("font-size", 36)
      .attr("font-family", "monospace")
    
    d3.json("nobel-winners.json", function(error, data) {
      if (error) throw error;

console.log(data.length);
      console.log('data', data);
      
      	//load the crossfilter
	   // var cf = crossfilter(presidents);
      const xfilter = crossfilter(data);
      const byCategory = xfilter.dimension(d => d.category);
      const byCountry = xfilter.dimension(function(d) {return d.country});
      const byYear = xfilter.dimension(d => d.year);
      const byGender = xfilter.dimension(d => d.gender);
      //console.log('byCategory', byCategory);
      //console.log('byCountry', byCountry);
     let  countryList = byCountry.bottom(Infinity)
	   let listDimension = byCountry
		 console.log('countrylist', countryList);
      
     var ctry_grp = byCountry.group().all();
		 var total = d3.sum(ctry_grp, function(d) {return d.value});
      console.log('country groups', ctry_grp);
       console.log('country total', total);
      
      byGender.filter("female");
      byCategory.filter("Physics");
      let femPhys = byGender.top(Infinity);
      console.log("femPhys", femPhys);
      byCategory.filter();
      let fems = byGender.top(Infinity);
      console.log("fems", fems);
      
    });
  </script>
</body>

https://d3js.org/d3.v4.min.js